.unit {
  width: 24px;
  height: 24px;
  font-size: 12px;
  background-color: var(--theme-bg-base);
  border: 1px solid var(--theme-border-base);
  line-height: 24px;
  text-align: center;
  border-radius: 3px;
  cursor: pointer;
  user-select: none;
  margin-right: 5px;
}